Artist Lee Ki-dae is murdered in his studio. His wife, An Yun-su, is held for questioning amid a media frenzy and relentless police investigation.

Prosecutor Baek pressures Yun-su as she is taken back to the crime scene. While she furiously protests her innocence, another woman admits her guilt.

Mo Eun and Yun-su come face to face. After public outcry over the investigation, Baek gets a warrant for the detention center and orders a polygraph test.

Yun-su is given an ankle monitor — and a curfew. After an attorney volunteers to represent Mo Eun, she sends a threatening letter to her new ally.

Yun-su chases a hooded figure just as Mo Eun is reported missing from prison. Baek starts to suspect that the two women may be one step ahead of him.

Yun-su digs up dirt on her target's sinister past and spots a potential clue in the studio. A violent fight breaks out while Mo Eun is left unsupervised.

Both women try to erase evidence which could change the course of the investigation. Meanwhile, Ko Se-hun is reported missing by his grandfather.

Mo Eun shares evidence that complicates Yun‑su's case. As Baek uncovers Se-hun's fatal crime, a new arrival in the cell stirs up old secrets.

Mo Eun raises eyebrows after a medical emergency. Attorney Jang Jeong-gu receives a pivotal phone call, and an escape attempt puts an inmate in danger.

A tense confrontation with Jeong-gu, Baek and Mo Eun reveals vital withheld information about the case. A shocking murder confession hits the news.

A hidden motive — and fingerprint — in Lee Ki-dae's murder case leads to an unlikely source. Mo Eun orchestrates a plan after news of a kidnapping.

As the pieces start falling into place in both murder cases, Baek and Jeong-gu receive a chilling video. Mo Eun has a final message for Yun-su.